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El ciclo de vida de Polistes erythrocephalus (latitud 3° 3D' N, longitud 76° 22' 21" W; 965 m.s.n.m.; 23.7°) tiene una duración de 110 días, oscilando entre 91 y 131 días. La capacidad de predación en jaulas de malla (2.5 x 2.5 x 2.5 m) depende del número de larvas. El consumo diario máximo fue d...
The parasitism, development, and thermal requirements of Trichogramma exiguum and Telenomus sphingis, common parasitoids of Erinnyis ello eggs, were studied. Life statistics were also determined for each specie and temp. (20, 25, and 30 degrees C for both species; for T. sphingis 32.5 degrees C w...
In order to determine the degree of parasitism of Erinnyis ello and E. alope eggs by Trichogramma and Telenomus under field conditions, 113 samples were collected, without determined dates, from Sept. 1978-March 1980, in Cruz das Almas, BA, Brazil, throughout the whole cassava cycle. Eggs were ta...
Approx 20 insects and mites were found attacking cassava in several regions of Colombia at different growth stagcs and seasons. Thrips (Frankliniella williamsi), gall midges (Cecidomyiidae) and whiteflies (Bemisia sp. and Trialeurodes sp.) were present in greater than 50 percent of the plantation...
Information on some diseases and pests that attack cassava, as well as the symptoms induced by nutritional deficiencies and toxicities and damage resulting from the misuse of herbicides are given in this manual. Specific and general recommendations regarding the control of the described problems ...
En este manual se presenta informacion sobre algunas de las enfermedades y plagas que atacan a la yuca, como tambien los sintomas inducidos por deficiencias y toxicidades nutricionales y danos debidos al uso incorrecto de los herbicidas. Se incluyen recomendaciones generales y especificas para el...
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